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"""Absolute Value."""

def abs_val(num):

"""

Find the absolute value of a number.

>>> abs_val(-5.1)

5.1

>>> abs_val(-5) == abs_val(5)

True

>>> abs_val(0)

0

"""

return -num if num < 0 else num

def test_abs_val():

"""

>>> test_abs_val()

"""

assert 0 == abs_val(0)

assert 34 == abs_val(34)

assert 100000000000 == abs_val(-100000000000)

if __name__ == "__main__":

print(abs_val(-34)) # --> 34